Author Description

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1836 Excerpt:... ing, d, fixed to the floor. The other lever E', however, has its bearing on the end of an arm, H', which is fixed to the end of a shaft, e'. Upon the centre of the shaft is fitted another lever, G', the end of which is connected by a long rod, I', with the first crank in the shaft N mentioned before. The other crank of this shaft, which moves ninety degrees from the former, is connected by a similar rod, H', with a bearing attached to pieces connecting the levers E' of the two sides of the machine. f is a counter-weight working upon the shaft e1 to balance the weight of the brushes. It will now be perceived that by moving the crank-shaft N from the position the drawing shows it in, the first crank will move the lever G', depress E', and of course also gradually depress the brush A' upon the warp, whilst the other one B' is gradually lifted up against it (the bar O turning upon the joint b'). At the same time, however, the second crank is drawing the frame E' and also the bar C forward, in the same way as a weaver used to apply the dressing by hand upon the warp in the loom. When the cranks have moved through 180 degrees, the brushes will have left the warp, and will move backwards at som distance above and beneath the warp, without touching it. SECTION III. The Sizing Machine. Instead of the dressing machine, in which a small quantity of paste is applied to the surface of the yarn, and is rubbed in between the fibres by means of brushes, there is now sometimes used a very simple apparatus to impregnate the yarn with size. It is a fact well known, particularly to dyers, that stuffs are not well penetrated by a fluid, &c., if they are not alternately immersed in the fluid, and then squeezed out again, for the purpose of expelling the air contained in the fibr...